Pete said: In a hobby in which chasing down even marginal sonic gains while avoiding deleterious tradeoffs can cost hundreds, thousands, even tens of thousands of dollars, a $49 device -- or, better yet, a $98 pair of them -- that can effect varying degrees of audible improvement is a no-brainer.

Jeff said: Those who want to perfectly blend a powered subwoofer(s) with topflight main speakers in a high-end stereo system should consider as mandatory JL Audio’s CR-1 Active Subwoofer Crossover. It’s flexible, transparent, and intuitive to use. So grab an audio buddy, spend a few hours with a CR-1 to dial in your system to the nth degree, and you’ll surely be rewarded.